Alignment of hypervariable regions of the 16S rRNA genes of N. mexicana sp. nov. and genotypically related species. Nucleotides that differ from N. asteroides are shown. Base positions, in parentheses, correspond to positions on the 16S rRNA gene of E. coli. The sequences used for comparison, determined in our laboratory, were N. mexicana sp. nov. CIP 108295T, OFN 704.62, and OFN 1325.82. The sequences obtained from GenBank were N. asteroides ATCC 19247T (Z82218), N. brasiliensis ATCC 19296T (X80591), N. pseudobrasiliensis DSM 44290T (X84857), and N. seriolae CIP 3036.93 (Z36925)T.